皮皮学，免费搜题
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【多选题】
大气污染物主要包括:()。A.
气溶胶状态污染物
B.
气体状态污染物
C.
气态污染物
D.
水蒸汽污染物
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皮皮学刷刷变学霸
举一反三
【单选题】听力原文：M: Oh, Anna, that's a wonderful dinner. That's the best meal that I've had in a long time. W: Oh, thank you, thank you very much. M: Can I give you a hand with the dishes? W: Oh, don't bother. I'...
A.
Husband and wife.
B.
Teacher and student.
C.
Father and daughter.
D.
Friends.
【单选题】听力原文：M: Oh, Anna, that's a wonderful dinner. That's the best meal that I've had in a long time. W: Oh, thank you, thank you very much. M: Can I give you a hand with the dishes? W: Oh, don't bother. I'...
A.
Husband and wife.
B.
Teacher and student.
C.
Father and daughter.
D.
Friends.
【单选题】伦敦外汇市场上，即期汇率为1英镑兑换：1.5893美元，90天远期汇率为1英镑兑换1.6382美元，表明美元的远期汇率为( )。
A.
升水
B.
平价
C.
贴水
D.
无法判定
【简答题】下列关于杜仲的说法正确的是( )A杜仲药用部位为树皮B杜仲加工需要“发汗”C折断面有细密,银白色,富弹性的橡胶丝相连D内表面暗紫色A. 1 B. 1 C. 1 D. 1
【简答题】给出以下命题： ①函数 f(x)=|lo g 2 x 2 | 既无最大值也无最小值； ②函数f（x）=|x 2 -2x-3|的图象关于直线x=1对称； ③若函数f（x）的定义域为（0，1），则函数f（x 2 ）的定义域为（-1，1）； ④若函数f（x）满足|f（-x）|=|f（x）|，则函数f（x）或是奇函数或是偶函数； ⑤设f（x）与g（x）是定义在R上的两个函数，若对任意x 1 ，x 2 ∈R...
【单选题】听力原文：M: Oh, Anna, that's a wonderful dinner. That's the best meal that I've had in a long time. W: Oh, thank you, thank you very much. M: Can I give you a hand with the dishes? W: Oh, don't bother. I'...
A.
Husband and wife.
B.
Teacher and student.
C.
Father and daughter.
D.
Friends.
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